Automobile sled



B. BERMAN AUTOMOBILE SLED Nov, 8, 1949 Filed May 28, 1948 5 Sheets-Sheet l a I a" 1 INVENTOR BENJAMIN HERMAN flfi B. BERMAN AUTOMOBILE SLED Nov. 8,1949

5 Shee'ts-Sheet 2 Filed May 28, 1948 INVENTOR BENJAMIN Beam-1m B. BERMAN AUTOMOBILE SLED Nov. 8, 1949 5 Sheets-Sheet 3 Filed May 28, 1948 MOTOR ]NVENTOR BENJAMIN BERMAN SUMP with: skis h etween mpertt essee -ie e p tt i tPetit on Patented Nov. 8,1949

F'E GE V ILAUEIOMOBILE SLED {7 Benjamin Beifman B poklyn, N. Y.

Application May 28 i 10.-Gla.j,ms.

I 1 v3 This inven ion-infla s: e ewzrandwus u i zpr vem nts 1, tin; la e-automo i i5 p ovide a w t :sSkiS.

--More speeifical-ly, vthetinventio l ro o set men ruat on: f;aa meutomob t:prov e 1 skisaarranee zin enmainn reth t t e skis: ma :extendfi (bene th the whee st the" automo to fiacilitatemotemen i tth au mobi o 's and ice. I

-:Stil1; anothen object of the apresent -invention .qproposesz t veqnstr-ueti m oissk wconn d t ,gether; for unitaryv movement andsnormally v rei d::. n m s d\pesitio trben a hn -run in 1 bo dmtthevehkh md rproyid d w th-openin s aaligned with the, wheels; in; a; manner so;; that e.-w ee eexten herethmu h e m t-tt m b e- :t z ...=',om r ww e sfl w nst erk .1 a e in: he-ra e inoperative p s io A furthen-Qbie t ftl-t e re t v m:e ati n41 poses the provision fremoyahle plate ymem hers tor F closing-.thappemngs; aligned with the front wheels of the i automohile and upon which the front. wheels, rest whenqthe 1;skis arev-extended 1noperative positio bfinfi mi t fw fi mannen toppermitunhagnperecL-movement oithe- 7 automobile over the snow( and iceon the;

Anothepohj ect;yoiz-thetpresentinvention proposes the;- q-1;ovis ion,-of pemovable. treadsiortextensionacrosstheppeningsgligned witht the ear nto-w vpropel the; automobi e a biorwerd -dii ece ition-on the shis.

Stil1 another,ohject ofq the pnesent invention proposes a; novel; ,valwe cpntrplled-. hydraiilic mechanism upon the vehicle in a rnannen-to con- .trolthe extension and retractionrof the. skis :rela- -=tiverto the wheelsflof the-automobile.

,- --S-till further the; -p r.esentinvention @proposes he automobile iii, a

' -;prpposes ,e ontraction settings interposed; between the sl zissand thelautomobile body in a manner a to hold-l the skis imtheir raised inopegative position.

all is a further; object \to providei anautomobile ich,;arequiclgly and easilytshifted 19.48,lSeria,1 N0i'295731 which are simpleand;durable andtwhichgan he a li d w utomobi e witho t materz ei xrincreasingwthe cost thereof.

For further comprehension of the {int er gtig n,

x 5 ended-t sw e s-andi dvaetaee the 9 re erence will be had to the following; de's igtion -,and.-accompanying drawings; and; to the apr m enev lwis forth.

In the accompanying dr awings to z niing a Inav,.-terial part of this disclosure B s s a side vatie a r iewt teneutemebi mrqt d h s in-acc rda e wf. h theznrw em invention and with the skis in a raised inggesatiye a position.

r Fig. 2 is a View.simiIaptmEigiJont illustgeipg ;.-the-skis inan intermediaterposition hetweerttheir oper ativenpositionland i-nopenative'po Fi 3. isano h w t t- .11 1 %to [.iti; len i1l ust1:ating the skis?i their enativ osition.

th s? s ave tice sect qn V W i the: mo.bile taken on; the line 4 4 ot lflig 1.

Fig. 5 is a -plan yiewtof one of the skisi peg se l looking in the direction .-,ot ;the AiIIBJr -S of Fig. 1.

Eig. Sis a iew.similan-to;aizportion of filiga; 5, but,illustratingthev remoyable plate nien loeig in 1 position in; the irontowning? optheaski. '30 Big: 7 is a yerticalsectionahyipw itaken on the line 11 otFig 6. V

Fig. 8 is a.verticaisectiqnat,viewJ -tal en,ors the line 8--8 'of Fig. 7

Sign 9 is aperspeetiveview ot one Of;.-t 1'1 l-'QQS mounted in, position in the; rear; ppeningof the .ski.

F 10: a ar ial v r cal section l ie take on; the, line l 0- .lll;o f;. 1ig: 9.-

Fig. 11; is a side elevationalgyiew; ,ofva portion 5M t ven s trackrof, t e trea Ei s: se la s drifr t .ele at on l View of the control valve for the hydraulic meqhanism i =monnted .'onthetdashs hoard of the agtgmebile. .@Ei i smmm t cl vi tst emdraul am ha is m t e r e t; tentio "*Ei ctiqn :m M the-dis ribut m sf the h u c-mechanis ;;-Eig: n15 is another; view ;of the walve of sthe hyd c anism sh w n thesam i ni a different position.

Tith ward nge e. lie e tinvent n, .gare rshown applied totan automobile 20 haying (the -usualbody; 2 I front; wheels 22;-;and ;1;ear wheels '23. wThes.

esmq parula m 5wasteases. Quinn miengnmntttth the front wheels 22 and the rear wheels 23. Intermediate of their ends, the skis 24 are connected together by a laterally extended strut 25. The front and rear ends of the skis 24 extend beyond the front and rear ends of the automobile and the front and rear extended ends of the skis 24 are connected together by struts 28, see Fig. 5. When the skis 24 are in the raised inoperative position shown in Fig. 1, the front and rear struts 28 act as front and rear bumpers for the automobile 28.

As shown in Fig. 5, the front ends of the skis 24 are formed with openings 2'! aligned with the front wheels 22 of the automobile and the rear ends of the skis 24' are formed with openings 28 aligned with the rear wheels 23. When the skis are in the raised inoperative position shown in Figs. 1 and 4, the front wheels 22 project through the front openings 21 and the rear wheels 23 project through the rear openings 28. As clearly shown in Fig. 5, the front openings 21 for the front wheels 22 are materially wider than the rear openings 28 so as to allow free steering movements of the front wheels 22 within the openings 21 when the skis are in the raised inoperative position.

Between the openings 21 and 28, each ski 24 is provided with a pair of longitudinally spaced pistons 29 which extend vertically therefrom and which are slidably received in cylinders 39 formed at the sides of the body 2| of the automobile 20. Hydraulic mechanism, to be hereinafter described, is provided for controlling the extension and retraction of the pistons 29 from the cylinders 30.

At points approximately midway between the pistons 29, the skis 24 are provided with upwardly extending lugs 3| to which the bottom ends of contraction springs 32 are attached. The top ends of the contraction springs 32 are anchored within hollow passageways 33 formed at the sides of the bod 2 I, between the cylinders 30. The springs 32 function to retain the skis 24 in their raised inoperative position shown in Fig. 1.

Removable plate members 34 are provided for closing the front openings 21 in the skis 24. These removable plate members 34 are mounted in position when the automobile is to run on the skis and the front wheels 22 rest on the top faces of the plate members 34 when the skis 24 are in the operative position shown in Fig. 3.

The plate members 34 are removably secured in position by means of pivotally mounted latches 35 mounted on the top face of the plate members 34 and which engage complementary keepers 36 mounted on the top faces of the skis 24 adjacent the openings 21. As shown in Fig. 7, the latches 35 are pivotally attached to the top face of the plate members 34 by means of pins 31. The latch members 36 are securely attached to the top face of the skis 24 by means of pins 38, se Fig. 8.

Treads 39 are provided for engagement beneath the rear wheels 23 in the operative position of the skis 24. The treads 39 are adapted to be mounted in the rear openings 28 and have the rear wheels 23 rest thereon so that rotations of the rear wheels 23 in a reverse direction will cause the treads to be rotated to propel the automobile in a forward direction.

Each of the treads 39 comprises a pair of spaced rollers 40 formed at their ends with extended trunnions 4|. An endless track 42 extends over the rollers 48 and is provided with projecting members 43 which are adapted to engage and grip the ice or snow. The projecting members 43 also improve the grip between the tires of the rear wheels 23 and the surface of the endless tracks 4'2. If desired, the tires of the rear wheels could also be provided with corrugations or teeth to engage the endless tracks 42 and improve the driving contact between those parts. As shown in Fig. 10, the endless tracks 42 may be made of rubber or other similar material.

The trunnions 4| at one side of the openings 28 are received in bearings 44 fixedly attached to the top face of the skis 24 at the same side of the opening. The other trunnions 4| are received in bearings 45 releasably attached to the top face of the skis 24 on the other side of the openings 28. The bearings 45 are releasably secured in position by means of thumb nuts 45 which engage threaded studs 41 which extend from the top face of the skis 24. When the bearings 45 are removed from the top face of the skis 24 then the trunnions 4| at the opposite sides of the rollers 48 may be slipped into and out of the fixedly mounted bearings 44 for mounting the treads 4| in position or for removing them from the skis 24. It is preferred that the removable bearing 45 be positioned along the outer sides of the skis 24 so that they will be easily accessible to one putting on and removing the treads 38 from the skis 24.

The interior of the body 2| of the automobile 28 is provided with the usual floor 48, see Fig. 4, and dash board 49. Also, within the body 2|, there is the usual clutch pedal 50 and separate brake pedals 5| and 52 for the right and left rear wheels, respectively. The brake pedals 5| and 52 are located immediately adjacent one another so that they may be simultaneously depressed for braking both the rear wheels when the automobile is operating normally on its wheels 22 and 23. However, the brake pedals 5| and 52 may be separately depressed to individually brake the rear wheels 23 when the automobile is operating on the skis so as to make it possible for the automobile to turn corners. When it is desired to make a right turn when the automobile is operating on the skis 24 it is merely necessary to step on the right brake pedal 5| which will stop the right rear wheel 23 from turning, leaving the left rear wheel 23 free to turn. Rotations of the left rear wheel 23 will turn its respective tread 39 and cause the automobile 20 to turn to the right about the right rear wheel 23 which will remain stationary. To turn the automobile 2D to the left, the same procedure is followed except that the left brake pedal 52 is depressed. It is to be understood that the usual differential (not shown) of the automobile 28 allows the rear wheels 23 to rotate independently when one of the pedals 5| or 52 is depressed.

The hydraulic mechanism for extending and retracting the pistons 29 from the cylinders 30 for extending and retracting the skis 24 is shown in Figs. 13 to 15. This mechanism includes a motor 69 having a driven shaft 6| connected to a pump 62. On Fig. 13 there is schematically i1- lustrated the circuit 83 for energizin the motor 60. The circuit 63 includes in series the usual source of electric current, which in this case is the battery of the automobile 2B, the motor 89 and a manually closable switch 84. The switch 84 is preferably mounted on the dash board 49 of the vehicle 20 adjacent the drivers seat so that the switch may be conveniently closed when it is desired to energize the motor 80. The intake side of the pump 62 is connected by means of a pipe mesa-see 85ziwithn a: sump fifircorrtainingna; hydrauiidifii-nd-i The :discliarge :siderot the pumofiz'zis'ins'turmcorw nested: bynneans :ofaa .pipe'. 61 with a. manually controllablezvalvetlicrnountedtom thezdash board; lfl of theautomobile .20g1see: Figs- 34 and 12:1. 1

The: manuallyi controllable: valve @682 inczludesa easingttiltformed with passagiese H :and. i2 located-ninety degrees from: eachwther'. Witlfin' the. casing :fillithere is: a rotatablewvalve member 131 having: a passage 1 M. extended-diametrically? therethrough; and a branch: passage extended laterally from the-passage: 1 4*: As r-slrown-imFi-gss 13::and2 114,. the: passage 19 of the. casing li kis con. nected with the. pipe: 61? lead-ingfrom: theiupump 62. The rotatable valve-amember i3 2 is connected. tor-an external handle: i6, see" Figs. :4 and P12, by whiclathe valve member: 135111313 bewturned: bee tween on and oil: posit-ionsaw A-piperl'l oonneots the passage H ofltheuvalve casing Blt-with'a hollow' distributorliiw Separate pipesw'lfii connect the interior of the" hollow' dis tributor 'ldwithf each 'of' the cylindersrfllaofa'thez skis. Thus; with the valve 681 turned: 1302 the onrposition shown in Fig. 13.1 and" the: switehxffim closedo'themotorrfiUzwill be energized toirotateithe" pump" EZvto pump hydraulic. fluid from'the" sump' fid through therpipe' 61; the passage-ll); thefpazs sageil lr (the passage'a will: be blocked by: the. interm'e'diateiwa'll;.of. thezcasing 69), thetpa'ssage Hestedrtoth'e ipassagel H 1ofthercasingr.tofandtone end :of the passage 'M 'Will be 'connect'edto the pas sage-1'2 (of the casing fifiran'dzth'ezother end of the passage l4 willz be 'rblocked-by the: intermediate wall of th"CC&SiI1g 59: Inwthis position,-=:-the Weight of the automobile Ziltomthe pistons' 25 will exhaust the hydraulic :fiuid. from. the eylindeis '31}? throughthe pipes 19; .theidistributor.l8; the pipe' l'lfthe .passage'c'll; thezpassage I5, the passage-l4; the passage 1.2 and the pipe' llfl baok: to the sump? 66':

The operation of the automobile providedwitlr skis in accordance with: the present inventiorn'is asdollows:

When the automobile 20 is running ondryland; the-shisfl twill be inthe raised position shownin' Fig. 1. with the wheels 22 ar1d=232extendedthrough the. openings Hand 28 in the skisto engagetthe ground;\ The skis will be retainedinithissraised. inoperative position by the contraotionsprings flc Whenit is desired to have'theautomobile run: on snow or ice on-theskis 24; 'the-switchm64o is CIOSGdiWlth-H'IB valve-68-turnedrto--the on position shown in- Fig-.13; This. will cause the motor 6! tabs-energized. to turn the-. pump 62 andpump: hydraulic fluid. from the sump.- 66: tothe cylinders. 39'. to extend the pistons 29.: therefrom to raise the automobile. zllitoxthe position shown-inFignZ.

In the raised position; the removable platememe berst l are mounted in-position to.- close the front: openings ill: in the skis 24 and thetreadsfigsarei mounted. in the rear opehings 28: of the-skis 2 t; When the plate members. stand thertreadseil: have been. mounted. in position, the: value. 681 is turned. to the off position shownint- Fig. :15 l allowingthe hydraulio-fiuidztoexhaust fromtheicylins.

6! dens-r311! iandenathe'n weightizoi: thezautomobiler 2 0; permittingsthe automobile to move downward: tothe iposit'ioru shown: in Fig. imwhich: the front: wheeliezz'rrestlomthe topnfaee ofithe plate'zmems' hers 34 am? th'ireamwheels 23;: rest; on; the top faceuofolthe: treadsre39'1 ianchthes: automobile: is nowrreadwto"mone overasnowior i'ceon-thezski's: 24;:

To; 'reixurmtheiskis-zztof. the inoperative. position shoWmimF-igid, the switchrfi liis again :closed with the valverSfl-rim thBiGHEQJOSifiOIJ." shown. inFi'g -13; sosthatahydi'auliezi fluid will: again :be: pumped; to: the I acylindersr'sof' .to"; extend; :the. pistons: 29;: to raise'i thesautomobilesj .2 to the :..p0sitionrshdwm iniui'ig. 5 Theiplatelmembersgsliz and the treads 3191i are:'thener-emovedo and: the valve? 68 is; their turmed'ftoi the: off positionxshown: in Fig:- 15: so: that thezhydrauiieifluidf will be: exhausted: from: the. cylimlers-zflfl baiekiintofthe: sump .616. .After theswheelsmtandzdtztouchthe ground: in moving from therzpositiorr'shdwn. int Fig:;-2: to'theposition. showmin Fig-J L, the: finazlws'tag-e of. movement otthe? skis? 2'4, Ito-w the fully inoperative position; is efieetedi by". thei'springsr 32;. 'drawing: the skis upwardrintouthe"fullyiinoperatixzeiposition showrr inzFi'g: i. =2

Insorderzto operate the automobile 20 on: the skis 24 itiis'i'necess aryrtoz haverthesmotor turning inira reversesdirectiom tof. tum .thezreanwheels: 2'3. inzsa: direction which: would normally! cause-the. automobile. 20.: to: move' backward'st This rotae' ti'om ofithe rear wheels. 23 will: be: reversed: by:the

treads 39 :sosassto' oausesthewehiole:tozmove in a forwardr'directiomrsee the arrows; 90. anda9l 011 Fig": 3-3? While. the skisnofinthez-presenttinvention are shown applied totiam automobilezof zthe :passenger type :omthef. drawings, :this .is 'by way of "illustrae; tionrorrly, ias the'.presentiinventions is also appli= cabletotpassen'ger buses;truck's,.and othersimilar lahd.-:vehiolesi-and :mayt'also: beadapted to: airs planeses:

Whil'el have-illustratedhndzdescribedthe preferrede embodimenizz-ofumyi invention; it is to be understood thataxI' .dornot flimitrmyself .to' the precise.-:reorrstructioris hereincdisclosed and the right :is reserved to-allschanges and; modifications comingruwithinxzthe. scopezcof the invention as definediin'the appended-claims:

Haringt'thuszdescribedtmy invention, what I claim tas new, and :desire: :to seeure by United States. Letters Patent is 1. InJ-Jan automobile having -=front and rear wheels; a :pair. ofoskisextended parallel to and longitudinally betweeneachwpair of. front and rear wheels-, said skisi-bei-ngiformediwith openings aligned-1 withthe' wheels and through 'whiclrthe wheels-extend:whemtheask-is 'areinlan inoperative raisediposition, means: for holdingthe skis'inan inoperative :raisedwpositiomwitht the wheels elf-t tendedethrongh":.thetopeningsso that the'car' may rum on? dry rxlandr'means-rr for: extending" the skis torpositionsibeneathzthe wheels: when. the automobile is totruniorr snowonice on the. skisrremow able platememberstmountede in thefront openineswfthe'skis when-the automobile is running on thezski's'. and: on the top. face of which the front wheels of the automobile rest,- andtreads. mounted in, the backi .openingsof: the skis when the auto-- mobile is. running 1 on. the :sk-is and: on the top face ofowhich therearwheels of the automobile rest-,2;

2. rlmanautomobilez having -.-front"and: rear aligned with the wheels and through which the wheels extend when the skis are in an inoperative raised position, means for holding the skis in an inoperative raised position with the wheels extended through the openings so that the car may run on dry land, means for extending the skis to positions beneath the wheels when the automobile is to run on snow or ice on the skis, removable plate members mounted in the front openings of the skis when the automobile is running on the skis and on the top face of which the front wheels of the automobile rest, and treads mounted in the back openings of the skis when the automobile is running on the skis and on the top face of which the rear wheels of the automobile rest, said skis being connected together for unitary movement by struts extended laterally between the skis.

3. In. an automobile having front and rear wheels, a pair of skis extended parallel to and longitudinally between each pair of front and rear wheels, said skis being formed with openings aligned with the wheels and through which the wheels extend when the skis are in an inoperative raised position, means for holding the skis in an inoperative raised position with the wheels extended through the openings so that the car may run on dry land, means for extending the skis to positions beneath the wheels when the automobile is to run on snow or ice on the skis, removable plate members mounted in the front openings of the skis when the automobile is running on the skis and on the top face of which the front wheels of the automobile rest, and treads mounted in the back openings of the skis when the automobile is running on the skis and on the top face of which the rear wheels of the automobile rest, said skis being connected together for unitary movement by struts extended laterally between the skis, said skis being extended beyond the front and rear ends of the automobile, and certain of said struts being extended between the skis at the ends thereof forming bumpers for the automobile when the skis are in the raised inoperative position.

4. In an automobile having front and rear wheels, a pair of skis extended parallel to and longitudinally between each pair of front and rear wheels, said skis being formed with openings aligned with the wheels and through which the wheels extend when the skis are in an inoperative raised position, means for holding the skis in an inoperative raised position with the wheels extended through the openings so that the car may run on dry land, means for extending the skis to positions beneath the wheels when the automobile is to run on snow or ice on the skis, removable plate members mounted in the front openings of the skis when the automobile is running on the skis and on the'top face of which the front wheels of the automobile rest, and treads mounted in the back openings of the skis when the automobile is running on the skis and on the top face of which the rear wheels of the automobile rest, said means for holding the skis in an inoperative raised position comprising contraction springs connected between said skis and the body of the automobile.

5. In an automobile having .front and rear wheels, 2. pair of skis extended parallel to and longitudinally between each pair of front and rear wheels, said skis being formed with openings aligned with the wheels and through which the wheels extend when the skis are in an inoperative raised position, means for holding the skis in an inoperative raised position with the wheels extended through the openings so that the car may run on dry land, means for extending the skis to positions beneath the wheels when the automobile is to run on snow or ice on the skis, removable plate members mounted in the front openings of the skis when the automobile is running on the skis and on the top face of which the front wheels of the automobile rest, and treads mounted in the back openings of the skis when the automobile is running on the skis and on the top face of which the rear wheels of the automobile rest, said removable plates being retained in position by means of pivotally mounted latches on the top face of the plates, and keepers mounted on the skis and engaged by the latches.

6. In an automobile having front and rear wheels, a pair of skis extended parallel to and longitudinally between each pair of front and rear wheels, said skis being formed with openings aligned with the wheels and through which the wheels extend when the skis are in an inoperative raised position, means for holding the skis in an inoperative raised position with the wheels extended through the openings so that the car may run on dry land, means for extending the skis to positions beneath the wheels when the automobile is to run on snow or ice on the skis, removable plate members mounted in the front openings of the skis when the automobile is running on the skis and on the top face of which the front wheels of the automobile rest, and treads mounted in the back openings of the skis when the automobile is running on the skis and on the top face of which the rear wheels of the automobile rest, said treads including continuous endless tracks of rubber engaged by said rear wheels.

7. In an automobile having front and rear wheels, a pair of skis extended parallel to and longitudinally between each pair of front and rear wheels, said skis being formed with openings aligned with the wheels and through which the wheels extend when the skis are in an inoperative raised position, means for holding the skis in an inoperative raised position with the wheels extended through the openings so that the car may run on dry land, means for extending the skis to positions beneath the wheels when the automobile is to run on snow or ice on the skis, removable plate members mounted in the front openings of the skis when the automobile is running on the skis and on the top face of which the front wheels of the automobile rest, and treads mounted in the back openings of the skis when the automobile is running on the skis and on the top face of which the rear wheels of the automobile rest, said treads including continuous endless tracks of rubber engaged by said rear wheels, and projecting members extending from said endless tracks for engaging the snow or ice over which the skis are moving.

8. In an automobile having front and rear wheels, a pair of skis extended parallel to and longitudinally between each pair of front and rear wheels, said skis being formed with openings aligned with the wheels and through which the wheels extend when the skis are in an inoperative raised position, means for holding the skis in an inoperative raised position with the wheels extended through the openings so that the car may run on dry land, means for extending the skis to positions beneath the wheels when the automobile is to run on snow or ice on the skis, removable plate members mounted in the front p s of the skis when the automobile is running on the skis and on the top face of which the front wheels of the automobile rest, and treads mounted in the back openings of the skis when the automobile is running on the skis and on the top face of which the rear wheels of the automobile rest, said extending means for said skis being hydraulically operated.

9. In an automobile having front and rear wheels, a pair of skis extended parallel to and longitudinally between each pair of front and rear wheels, said skis being formed with openings aligned with the wheels and through which the wheels extend when the skis are in an inoperative raised position, means for holding the skis in an inoperative raised position with the wheels extended through the openings so that the car may run on dry land, means for extending the skis to positions beneath the wheels when the automobile is to run on snow or ice on the skis, re movable plate members mounted in the front openings of the skis when the automobile is running on the skis and on the top face of which the front wheels of the automobile rest, and treads mounted in the back openings of the skis when the automobile is running on the skis and on the top face of which the rear wheels of the automobile rest, said extending means for said skis being hydraulically operated, said hydraulic extending means including a manually operable valve mounted on the dash board of the vehicle.

10. In an automobile having front and rear wheels, a pair of skis extended parallel to and longitudinally between each pair of front and rear wheels, said skis being formed with openings aligned with the wheels and through which the wheels extend when the skis are in an inop- 10 erative raised position, means for holding the skis in an inoperative raised position with the wheels extended through the openings so that the car may run on dry land, means for extending the skis to positions beneath the Wheels when the automobile is to run on snow or ice on the skis, removable plate members mounted in the front openings of the skis when the automobile is running on the skis and on the top face of which the front wheels of the automobile rest, and threads mounted in the back openings of the skis when the automobile is running on the skis and on the top face of which the rear wheels of the automobile rest, said extending means for said skis being hydraulically operated, said hydraulic extending means including a pair of cylinders for each of said skis mounted on the automobile and each having an extendable piston connected to its respective ski.

BENJAMIN BERMAN.

REFERENCES CITED The" following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,355,853 Habsburg-Lothringen Oct. 19, 1920 1,622,719 Hofmeister Mar. 29, 1927 2,051,496 Sarrazin Aug. 18, 1936 FOREIGN PATENTS Number Country Date 652,025 Germany Oct. 23, 1937 

